./Ultimate.py --spec ../sv-benchmarks/c/properties/valid-memsafety.prp --file ../sv-benchmarks/c/memsafety/test-0235-3.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version e2fb8bed Calling Ultimate with: /root/.sdkman/candidates/java/21.0.5-tem/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.6.800.v20240513-1750.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerMemDerefMemtrack.xml -i ../sv-benchmarks/c/memsafety/test-0235-3.i -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 02c65307022e35fe6a7161faa785e5b34e94ccda4b82967e279eadaf3aa37bc3 --- Real Ultimate output --- This is Ultimate 0.3.0-?-e2fb8be-m [2025-03-08 22:49:51,556 INFO L188 SettingsManager]: Resetting all preferences to default values... [2025-03-08 22:49:51,609 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2025-03-08 22:49:51,615 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2025-03-08 22:49:51,618 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2025-03-08 22:49:51,632 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2025-03-08 22:49:51,632 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2025-03-08 22:49:51,633 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2025-03-08 22:49:51,633 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2025-03-08 22:49:51,633 INFO L153 SettingsManager]: * Use memory slicer=true [2025-03-08 22:49:51,633 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2025-03-08 22:49:51,633 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2025-03-08 22:49:51,634 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2025-03-08 22:49:51,634 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2025-03-08 22:49:51,634 INFO L153 SettingsManager]: * Use SBE=true [2025-03-08 22:49:51,635 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2025-03-08 22:49:51,635 INFO L153 SettingsManager]: * sizeof long=4 [2025-03-08 22:49:51,635 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2025-03-08 22:49:51,635 INFO L153 SettingsManager]: * sizeof POINTER=4 [2025-03-08 22:49:51,635 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2025-03-08 22:49:51,635 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2025-03-08 22:49:51,635 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2025-03-08 22:49:51,635 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2025-03-08 22:49:51,636 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2025-03-08 22:49:51,636 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2025-03-08 22:49:51,636 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2025-03-08 22:49:51,636 INFO L153 SettingsManager]: * sizeof long double=12 [2025-03-08 22:49:51,636 INFO L153 SettingsManager]: * Behaviour of calls to undefined functions=OVERAPPROXIMATE_BEHAVIOUR [2025-03-08 22:49:51,636 INFO L153 SettingsManager]: * Use constant arrays=true [2025-03-08 22:49:51,636 INFO L151 SettingsManager]: Preferences of IcfgBuilder differ from their defaults: [2025-03-08 22:49:51,636 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2025-03-08 22:49:51,636 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2025-03-08 22:49:51,636 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2025-03-08 22:49:51,636 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-03-08 22:49:51,637 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2025-03-08 22:49:51,637 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2025-03-08 22:49:51,637 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2025-03-08 22:49:51,637 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2025-03-08 22:49:51,637 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2025-03-08 22:49:51,637 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2025-03-08 22:49:51,637 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2025-03-08 22:49:51,637 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2025-03-08 22:49:51,638 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 02c65307022e35fe6a7161faa785e5b34e94ccda4b82967e279eadaf3aa37bc3 [2025-03-08 22:49:51,849 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2025-03-08 22:49:51,857 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2025-03-08 22:49:51,859 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2025-03-08 22:49:51,860 INFO L270 PluginConnector]: Initializing CDTParser... [2025-03-08 22:49:51,860 INFO L274 PluginConnector]: CDTParser initialized [2025-03-08 22:49:51,861 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/memsafety/test-0235-3.i [2025-03-08 22:49:53,012 INFO L533 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/19573e821/86ec910c47024055aaec8234d8f52c41/FLAGea71275d9 [2025-03-08 22:49:53,306 INFO L384 CDTParser]: Found 1 translation units. [2025-03-08 22:49:53,309 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/memsafety/test-0235-3.i [2025-03-08 22:49:53,318 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/19573e821/86ec910c47024055aaec8234d8f52c41/FLAGea71275d9 [2025-03-08 22:49:53,334 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/19573e821/86ec910c47024055aaec8234d8f52c41 [2025-03-08 22:49:53,335 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2025-03-08 22:49:53,336 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2025-03-08 22:49:53,337 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2025-03-08 22:49:53,337 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2025-03-08 22:49:53,340 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2025-03-08 22:49:53,341 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 08.03 10:49:53" (1/1) ... [2025-03-08 22:49:53,341 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@eec5165 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.03 10:49:53, skipping insertion in model container [2025-03-08 22:49:53,341 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 08.03 10:49:53" (1/1) ... [2025-03-08 22:49:53,367 INFO L175 MainTranslator]: Built tables and reachable declarations [2025-03-08 22:49:53,591 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-03-08 22:49:53,601 INFO L200 MainTranslator]: Completed pre-run [2025-03-08 22:49:53,640 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-03-08 22:49:53,664 INFO L204 MainTranslator]: Completed translation [2025-03-08 22:49:53,664 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.03 10:49:53 WrapperNode [2025-03-08 22:49:53,664 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2025-03-08 22:49:53,665 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2025-03-08 22:49:53,665 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2025-03-08 22:49:53,666 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2025-03-08 22:49:53,669 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.03 10:49:53" (1/1) ... [2025-03-08 22:49:53,678 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.03 10:49:53" (1/1) ... [2025-03-08 22:49:53,694 INFO L138 Inliner]: procedures = 188, calls = 73, calls flagged for inlining = 13, calls inlined = 13, statements flattened = 236 [2025-03-08 22:49:53,694 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2025-03-08 22:49:53,695 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2025-03-08 22:49:53,695 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2025-03-08 22:49:53,695 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2025-03-08 22:49:53,700 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.03 10:49:53" (1/1) ... [2025-03-08 22:49:53,700 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.03 10:49:53" (1/1) ... [2025-03-08 22:49:53,704 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.03 10:49:53" (1/1) ... [2025-03-08 22:49:53,725 INFO L175 MemorySlicer]: Split 39 memory accesses to 3 slices as follows [2, 11, 26]. 67 percent of accesses are in the largest equivalence class. The 3 initializations are split as follows [2, 1, 0]. The 13 writes are split as follows [0, 1, 12]. [2025-03-08 22:49:53,726 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.03 10:49:53" (1/1) ... [2025-03-08 22:49:53,726 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.03 10:49:53" (1/1) ... [2025-03-08 22:49:53,734 INFO L184 PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.03 10:49:53" (1/1) ... [2025-03-08 22:49:53,735 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.03 10:49:53" (1/1) ... [2025-03-08 22:49:53,736 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.03 10:49:53" (1/1) ... [2025-03-08 22:49:53,737 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.03 10:49:53" (1/1) ... [2025-03-08 22:49:53,739 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2025-03-08 22:49:53,740 INFO L112 PluginConnector]: ------------------------IcfgBuilder---------------------------- [2025-03-08 22:49:53,740 INFO L270 PluginConnector]: Initializing IcfgBuilder... [2025-03-08 22:49:53,740 INFO L274 PluginConnector]: IcfgBuilder initialized [2025-03-08 22:49:53,740 INFO L184 PluginConnector]: Executing the observer IcfgBuilderObserver from plugin IcfgBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.03 10:49:53" (1/1) ... [2025-03-08 22:49:53,744 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-03-08 22:49:53,752 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-08 22:49:53,761 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2025-03-08 22:49:53,763 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2025-03-08 22:49:53,778 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2025-03-08 22:49:53,778 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2025-03-08 22:49:53,778 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#0 [2025-03-08 22:49:53,778 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#1 [2025-03-08 22:49:53,778 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#2 [2025-03-08 22:49:53,778 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#0 [2025-03-08 22:49:53,778 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#1 [2025-03-08 22:49:53,778 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#2 [2025-03-08 22:49:53,778 INFO L130 BoogieDeclarations]: Found specification of procedure zalloc_or_die [2025-03-08 22:49:53,778 INFO L138 BoogieDeclarations]: Found implementation of procedure zalloc_or_die [2025-03-08 22:49:53,778 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2025-03-08 22:49:53,778 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$#0 [2025-03-08 22:49:53,778 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$#1 [2025-03-08 22:49:53,778 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$#2 [2025-03-08 22:49:53,778 INFO L130 BoogieDeclarations]: Found specification of procedure l0_destroy [2025-03-08 22:49:53,778 INFO L138 BoogieDeclarations]: Found implementation of procedure l0_destroy [2025-03-08 22:49:53,778 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2025-03-08 22:49:53,778 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2025-03-08 22:49:53,778 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2025-03-08 22:49:53,778 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2025-03-08 22:49:53,778 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2025-03-08 22:49:53,894 INFO L256 CfgBuilder]: Building ICFG [2025-03-08 22:49:53,896 INFO L286 CfgBuilder]: Building CFG for each procedure with an implementation [2025-03-08 22:49:54,145 INFO L1307 $ProcedureCfgBuilder]: dead code at ProgramPoint L642: havoc calloc_model_#t~memset~res4#1.base, calloc_model_#t~memset~res4#1.offset; [2025-03-08 22:49:54,299 INFO L1307 $ProcedureCfgBuilder]: dead code at ProgramPoint L788: havoc main_#t~mem39#1.base, main_#t~mem39#1.offset; [2025-03-08 22:49:54,329 INFO L? ?]: Removed 203 outVars from TransFormulas that were not future-live. [2025-03-08 22:49:54,329 INFO L307 CfgBuilder]: Performing block encoding [2025-03-08 22:49:54,343 INFO L331 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2025-03-08 22:49:54,343 INFO L336 CfgBuilder]: Removed 0 assume(true) statements. [2025-03-08 22:49:54,343 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 08.03 10:49:54 BoogieIcfgContainer [2025-03-08 22:49:54,343 INFO L131 PluginConnector]: ------------------------ END IcfgBuilder---------------------------- [2025-03-08 22:49:54,347 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2025-03-08 22:49:54,347 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2025-03-08 22:49:54,350 INFO L274 PluginConnector]: TraceAbstraction initialized [2025-03-08 22:49:54,350 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 08.03 10:49:53" (1/3) ... [2025-03-08 22:49:54,351 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1acb80ff and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 08.03 10:49:54, skipping insertion in model container [2025-03-08 22:49:54,351 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.03 10:49:53" (2/3) ... [2025-03-08 22:49:54,351 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1acb80ff and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 08.03 10:49:54, skipping insertion in model container [2025-03-08 22:49:54,351 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 08.03 10:49:54" (3/3) ... [2025-03-08 22:49:54,352 INFO L128 eAbstractionObserver]: Analyzing ICFG test-0235-3.i [2025-03-08 22:49:54,361 INFO L216 ceAbstractionStarter]: Automizer settings: Hoare:None NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2025-03-08 22:49:54,362 INFO L151 ceAbstractionStarter]: Applying trace abstraction to ICFG test-0235-3.i that has 3 procedures, 238 locations, 1 initial locations, 11 loop locations, and 89 error locations. [2025-03-08 22:49:54,407 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2025-03-08 22:49:54,418 INFO L333 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=None, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@592900e1, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2025-03-08 22:49:54,418 INFO L334 AbstractCegarLoop]: Starting to check reachability of 89 error locations. [2025-03-08 22:49:54,421 INFO L276 IsEmpty]: Start isEmpty. Operand has 238 states, 133 states have (on average 1.9097744360902256) internal successors, (254), 222 states have internal predecessors, (254), 13 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2025-03-08 22:49:54,425 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2025-03-08 22:49:54,426 INFO L210 NwaCegarLoop]: Found error trace [2025-03-08 22:49:54,427 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1] [2025-03-08 22:49:54,427 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [l0_destroyErr0ASSERT_VIOLATIONMEMORY_FREE, l0_destroyErr1ASSERT_VIOLATIONMEMORY_FREE, l0_destroyErr2ASSERT_VIOLATIONMEMORY_FREE (and 86 more)] === [2025-03-08 22:49:54,431 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 22:49:54,432 INFO L85 PathProgramCache]: Analyzing trace with hash 9264869, now seen corresponding path program 1 times [2025-03-08 22:49:54,437 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 22:49:54,439 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [58878758] [2025-03-08 22:49:54,440 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-08 22:49:54,440 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 22:49:54,488 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 4 statements into 1 equivalence classes. [2025-03-08 22:49:54,492 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 4 of 4 statements. [2025-03-08 22:49:54,492 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-08 22:49:54,493 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 22:49:54,517 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-08 22:49:54,517 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 22:49:54,518 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [58878758] [2025-03-08 22:49:54,519 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [58878758] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-08 22:49:54,519 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-08 22:49:54,520 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2025-03-08 22:49:54,521 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [9054205] [2025-03-08 22:49:54,521 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-08 22:49:54,523 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2025-03-08 22:49:54,523 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 22:49:54,541 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2025-03-08 22:49:54,541 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2025-03-08 22:49:54,544 INFO L87 Difference]: Start difference. First operand has 238 states, 133 states have (on average 1.9097744360902256) internal successors, (254), 222 states have internal predecessors, (254), 13 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) Second operand has 2 states, 2 states have (on average 2.0) internal successors, (4), 2 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-08 22:49:54,570 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-08 22:49:54,571 INFO L93 Difference]: Finished difference Result 238 states and 269 transitions. [2025-03-08 22:49:54,571 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2025-03-08 22:49:54,572 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 2.0) internal successors, (4), 2 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 4 [2025-03-08 22:49:54,573 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-08 22:49:54,577 INFO L225 Difference]: With dead ends: 238 [2025-03-08 22:49:54,577 INFO L226 Difference]: Without dead ends: 236 [2025-03-08 22:49:54,579 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2025-03-08 22:49:54,581 INFO L435 NwaCegarLoop]: 269 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 269 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2025-03-08 22:49:54,581 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 269 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-03-08 22:49:54,591 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 236 states. [2025-03-08 22:49:54,611 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 236 to 236. [2025-03-08 22:49:54,613 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 236 states, 132 states have (on average 1.8257575757575757) internal successors, (241), 220 states have internal predecessors, (241), 13 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2025-03-08 22:49:54,621 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 236 states to 236 states and 267 transitions. [2025-03-08 22:49:54,623 INFO L78 Accepts]: Start accepts. Automaton has 236 states and 267 transitions. Word has length 4 [2025-03-08 22:49:54,624 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-08 22:49:54,624 INFO L471 AbstractCegarLoop]: Abstraction has 236 states and 267 transitions. [2025-03-08 22:49:54,624 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 2.0) internal successors, (4), 2 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-08 22:49:54,624 INFO L276 IsEmpty]: Start isEmpty. Operand 236 states and 267 transitions. [2025-03-08 22:49:54,624 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2025-03-08 22:49:54,624 INFO L210 NwaCegarLoop]: Found error trace [2025-03-08 22:49:54,624 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2025-03-08 22:49:54,625 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2025-03-08 22:49:54,625 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting zalloc_or_dieErr1ASSERT_VIOLATIONMEMORY_DEREFERENCE === [l0_destroyErr0ASSERT_VIOLATIONMEMORY_FREE, l0_destroyErr1ASSERT_VIOLATIONMEMORY_FREE, l0_destroyErr2ASSERT_VIOLATIONMEMORY_FREE (and 86 more)] === [2025-03-08 22:49:54,625 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 22:49:54,625 INFO L85 PathProgramCache]: Analyzing trace with hash 313693404, now seen corresponding path program 1 times [2025-03-08 22:49:54,625 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 22:49:54,626 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [40516530] [2025-03-08 22:49:54,626 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-08 22:49:54,626 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 22:49:54,639 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 6 statements into 1 equivalence classes. [2025-03-08 22:49:54,654 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 6 of 6 statements. [2025-03-08 22:49:54,654 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-08 22:49:54,654 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 22:49:54,733 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-08 22:49:54,733 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 22:49:54,733 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [40516530] [2025-03-08 22:49:54,733 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [40516530] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-08 22:49:54,733 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-08 22:49:54,733 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2025-03-08 22:49:54,733 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2105162237] [2025-03-08 22:49:54,733 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-08 22:49:54,734 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2025-03-08 22:49:54,734 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 22:49:54,734 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2025-03-08 22:49:54,734 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2025-03-08 22:49:54,734 INFO L87 Difference]: Start difference. First operand 236 states and 267 transitions. Second operand has 3 states, 2 states have (on average 2.5) internal successors, (5), 3 states have internal predecessors, (5), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-08 22:49:54,867 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-08 22:49:54,867 INFO L93 Difference]: Finished difference Result 235 states and 266 transitions. [2025-03-08 22:49:54,868 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2025-03-08 22:49:54,868 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 2.5) internal successors, (5), 3 states have internal predecessors, (5), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2025-03-08 22:49:54,868 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-08 22:49:54,869 INFO L225 Difference]: With dead ends: 235 [2025-03-08 22:49:54,869 INFO L226 Difference]: Without dead ends: 235 [2025-03-08 22:49:54,869 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2025-03-08 22:49:54,870 INFO L435 NwaCegarLoop]: 261 mSDtfsCounter, 4 mSDsluCounter, 176 mSDsCounter, 0 mSdLazyCounter, 90 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 437 SdHoareTripleChecker+Invalid, 90 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 90 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-03-08 22:49:54,870 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 437 Invalid, 90 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 90 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-03-08 22:49:54,871 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 235 states. [2025-03-08 22:49:54,877 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 235 to 235. [2025-03-08 22:49:54,877 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 235 states, 132 states have (on average 1.8181818181818181) internal successors, (240), 219 states have internal predecessors, (240), 13 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2025-03-08 22:49:54,879 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 235 states to 235 states and 266 transitions. [2025-03-08 22:49:54,879 INFO L78 Accepts]: Start accepts. Automaton has 235 states and 266 transitions. Word has length 6 [2025-03-08 22:49:54,879 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-08 22:49:54,880 INFO L471 AbstractCegarLoop]: Abstraction has 235 states and 266 transitions. [2025-03-08 22:49:54,880 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 2.5) internal successors, (5), 3 states have internal predecessors, (5), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-08 22:49:54,880 INFO L276 IsEmpty]: Start isEmpty. Operand 235 states and 266 transitions. [2025-03-08 22:49:54,880 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2025-03-08 22:49:54,880 INFO L210 NwaCegarLoop]: Found error trace [2025-03-08 22:49:54,880 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2025-03-08 22:49:54,880 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2025-03-08 22:49:54,880 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting zalloc_or_dieErr0ASSERT_VIOLATIONMEMORY_DEREFERENCE === [l0_destroyErr0ASSERT_VIOLATIONMEMORY_FREE, l0_destroyErr1ASSERT_VIOLATIONMEMORY_FREE, l0_destroyErr2ASSERT_VIOLATIONMEMORY_FREE (and 86 more)] === [2025-03-08 22:49:54,881 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 22:49:54,881 INFO L85 PathProgramCache]: Analyzing trace with hash 1134561033, now seen corresponding path program 1 times [2025-03-08 22:49:54,881 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 22:49:54,881 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2054533169] [2025-03-08 22:49:54,881 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-08 22:49:54,881 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 22:49:54,887 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 7 statements into 1 equivalence classes. [2025-03-08 22:49:54,900 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 7 of 7 statements. [2025-03-08 22:49:54,900 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-08 22:49:54,900 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unknown [2025-03-08 22:49:54,901 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [826987958] [2025-03-08 22:49:54,901 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-08 22:49:54,905 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 22:49:54,905 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-08 22:49:54,907 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-08 22:49:54,909 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2025-03-08 22:49:54,964 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 7 statements into 1 equivalence classes. [2025-03-08 22:49:54,974 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 7 of 7 statements. [2025-03-08 22:49:54,974 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-08 22:49:54,974 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 22:49:54,980 INFO L256 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 24 conjuncts are in the unsatisfiable core [2025-03-08 22:49:54,984 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-08 22:49:55,034 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2025-03-08 22:49:55,050 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-08 22:49:55,051 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2025-03-08 22:49:55,051 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 22:49:55,051 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2054533169] [2025-03-08 22:49:55,051 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2025-03-08 22:49:55,052 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [826987958] [2025-03-08 22:49:55,052 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [826987958] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-08 22:49:55,052 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-08 22:49:55,052 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2025-03-08 22:49:55,052 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [646321074] [2025-03-08 22:49:55,052 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-08 22:49:55,052 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2025-03-08 22:49:55,052 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 22:49:55,053 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2025-03-08 22:49:55,053 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2025-03-08 22:49:55,053 INFO L87 Difference]: Start difference. First operand 235 states and 266 transitions. Second operand has 4 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-08 22:49:55,190 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-08 22:49:55,190 INFO L93 Difference]: Finished difference Result 244 states and 275 transitions. [2025-03-08 22:49:55,190 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2025-03-08 22:49:55,190 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2025-03-08 22:49:55,191 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-08 22:49:55,191 INFO L225 Difference]: With dead ends: 244 [2025-03-08 22:49:55,192 INFO L226 Difference]: Without dead ends: 244 [2025-03-08 22:49:55,192 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2025-03-08 22:49:55,193 INFO L435 NwaCegarLoop]: 256 mSDtfsCounter, 11 mSDsluCounter, 439 mSDsCounter, 0 mSdLazyCounter, 98 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 695 SdHoareTripleChecker+Invalid, 102 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 98 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-03-08 22:49:55,194 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 695 Invalid, 102 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 98 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-03-08 22:49:55,195 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 244 states. [2025-03-08 22:49:55,209 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 244 to 244. [2025-03-08 22:49:55,209 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 244 states, 140 states have (on average 1.7785714285714285) internal successors, (249), 227 states have internal predecessors, (249), 13 states have call successors, (13), 3 states have call predecessors, (13), 3 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2025-03-08 22:49:55,211 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 244 states to 244 states and 275 transitions. [2025-03-08 22:49:55,211 INFO L78 Accepts]: Start accepts. Automaton has 244 states and 275 transitions. Word has length 7 [2025-03-08 22:49:55,211 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-08 22:49:55,211 INFO L471 AbstractCegarLoop]: Abstraction has 244 states and 275 transitions. [2025-03-08 22:49:55,211 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-08 22:49:55,211 INFO L276 IsEmpty]: Start isEmpty. Operand 244 states and 275 transitions. [2025-03-08 22:49:55,212 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2025-03-08 22:49:55,212 INFO L210 NwaCegarLoop]: Found error trace [2025-03-08 22:49:55,212 INFO L218 NwaCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-08 22:49:55,222 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2025-03-08 22:49:55,420 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 22:49:55,420 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting zalloc_or_dieErr0ASSERT_VIOLATIONMEMORY_DEREFERENCE === [l0_destroyErr0ASSERT_VIOLATIONMEMORY_FREE, l0_destroyErr1ASSERT_VIOLATIONMEMORY_FREE, l0_destroyErr2ASSERT_VIOLATIONMEMORY_FREE (and 86 more)] === [2025-03-08 22:49:55,420 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 22:49:55,420 INFO L85 PathProgramCache]: Analyzing trace with hash 528751200, now seen corresponding path program 1 times [2025-03-08 22:49:55,421 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 22:49:55,421 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1275759242] [2025-03-08 22:49:55,421 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-08 22:49:55,421 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 22:49:55,454 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 66 statements into 1 equivalence classes. [2025-03-08 22:49:55,496 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 66 of 66 statements. [2025-03-08 22:49:55,496 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-08 22:49:55,496 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unknown [2025-03-08 22:49:55,499 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [454307220] [2025-03-08 22:49:55,499 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-08 22:49:55,500 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 22:49:55,500 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-08 22:49:55,501 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-08 22:49:55,503 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2025-03-08 22:49:55,580 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 66 statements into 1 equivalence classes. [2025-03-08 22:49:55,632 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 66 of 66 statements. [2025-03-08 22:49:55,632 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-08 22:49:55,632 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 22:49:55,635 INFO L256 TraceCheckSpWp]: Trace formula consists of 500 conjuncts, 58 conjuncts are in the unsatisfiable core [2025-03-08 22:49:55,639 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-08 22:49:55,658 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2025-03-08 22:49:55,694 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2025-03-08 22:49:55,770 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 55 proven. 16 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2025-03-08 22:49:55,773 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-08 22:49:55,953 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 47 proven. 0 refuted. 0 times theorem prover too weak. 58 trivial. 0 not checked. [2025-03-08 22:49:55,955 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 22:49:55,955 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1275759242] [2025-03-08 22:49:55,955 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2025-03-08 22:49:55,955 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [454307220] [2025-03-08 22:49:55,955 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [454307220] provided 1 perfect and 1 imperfect interpolant sequences [2025-03-08 22:49:55,955 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2025-03-08 22:49:55,955 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [7] total 10 [2025-03-08 22:49:55,955 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2080809293] [2025-03-08 22:49:55,956 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-08 22:49:55,956 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2025-03-08 22:49:55,956 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 22:49:55,957 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2025-03-08 22:49:55,957 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2025-03-08 22:49:55,957 INFO L87 Difference]: Start difference. First operand 244 states and 275 transitions. Second operand has 5 states, 5 states have (on average 6.2) internal successors, (31), 5 states have internal predecessors, (31), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 1 states have call successors, (5) [2025-03-08 22:49:55,991 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-08 22:49:55,992 INFO L93 Difference]: Finished difference Result 250 states and 281 transitions. [2025-03-08 22:49:55,992 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2025-03-08 22:49:55,992 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 6.2) internal successors, (31), 5 states have internal predecessors, (31), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 1 states have call successors, (5) Word has length 66 [2025-03-08 22:49:55,992 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-08 22:49:55,993 INFO L225 Difference]: With dead ends: 250 [2025-03-08 22:49:55,993 INFO L226 Difference]: Without dead ends: 245 [2025-03-08 22:49:55,993 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 122 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2025-03-08 22:49:55,994 INFO L435 NwaCegarLoop]: 266 mSDtfsCounter, 7 mSDsluCounter, 507 mSDsCounter, 0 mSdLazyCounter, 25 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 773 SdHoareTripleChecker+Invalid, 30 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 25 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2025-03-08 22:49:55,994 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 773 Invalid, 30 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 25 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-03-08 22:49:55,995 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 245 states. [2025-03-08 22:49:56,000 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 245 to 245. [2025-03-08 22:49:56,001 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 245 states, 141 states have (on average 1.7730496453900708) internal successors, (250), 228 states have internal predecessors, (250), 13 states have call successors, (13), 3 states have call predecessors, (13), 3 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2025-03-08 22:49:56,002 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 245 states to 245 states and 276 transitions. [2025-03-08 22:49:56,002 INFO L78 Accepts]: Start accepts. Automaton has 245 states and 276 transitions. Word has length 66 [2025-03-08 22:49:56,003 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-08 22:49:56,003 INFO L471 AbstractCegarLoop]: Abstraction has 245 states and 276 transitions. [2025-03-08 22:49:56,003 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 6.2) internal successors, (31), 5 states have internal predecessors, (31), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 1 states have call successors, (5) [2025-03-08 22:49:56,003 INFO L276 IsEmpty]: Start isEmpty. Operand 245 states and 276 transitions. [2025-03-08 22:49:56,006 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2025-03-08 22:49:56,006 INFO L210 NwaCegarLoop]: Found error trace [2025-03-08 22:49:56,007 INFO L218 NwaCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-08 22:49:56,014 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2025-03-08 22:49:56,207 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3 [2025-03-08 22:49:56,207 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting zalloc_or_dieErr0ASSERT_VIOLATIONMEMORY_DEREFERENCE === [l0_destroyErr0ASSERT_VIOLATIONMEMORY_FREE, l0_destroyErr1ASSERT_VIOLATIONMEMORY_FREE, l0_destroyErr2ASSERT_VIOLATIONMEMORY_FREE (and 86 more)] === [2025-03-08 22:49:56,208 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 22:49:56,208 INFO L85 PathProgramCache]: Analyzing trace with hash -1869176653, now seen corresponding path program 1 times [2025-03-08 22:49:56,208 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 22:49:56,208 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [238771393] [2025-03-08 22:49:56,208 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-08 22:49:56,208 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 22:49:56,228 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 71 statements into 1 equivalence classes. [2025-03-08 22:49:56,386 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 71 of 71 statements. [2025-03-08 22:49:56,386 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-08 22:49:56,387 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unknown [2025-03-08 22:49:56,391 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [74310496] [2025-03-08 22:49:56,392 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-08 22:49:56,392 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 22:49:56,392 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-08 22:49:56,394 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-08 22:49:56,395 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2025-03-08 22:49:56,497 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 71 statements into 1 equivalence classes. [2025-03-08 22:49:56,589 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 71 of 71 statements. [2025-03-08 22:49:56,589 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-08 22:49:56,589 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 22:49:56,592 INFO L256 TraceCheckSpWp]: Trace formula consists of 575 conjuncts, 33 conjuncts are in the unsatisfiable core [2025-03-08 22:49:56,596 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-08 22:49:56,623 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2025-03-08 22:49:56,651 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2025-03-08 22:49:56,715 INFO L134 CoverageAnalysis]: Checked inductivity of 140 backedges. 102 proven. 5 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2025-03-08 22:49:56,715 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-08 22:49:56,894 INFO L134 CoverageAnalysis]: Checked inductivity of 140 backedges. 37 proven. 23 refuted. 0 times theorem prover too weak. 80 trivial. 0 not checked. [2025-03-08 22:49:56,894 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 22:49:56,894 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [238771393] [2025-03-08 22:49:56,894 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2025-03-08 22:49:56,894 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [74310496] [2025-03-08 22:49:56,894 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [74310496] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-08 22:49:56,894 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2025-03-08 22:49:56,894 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 11 [2025-03-08 22:49:56,894 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [89803279] [2025-03-08 22:49:56,894 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2025-03-08 22:49:56,895 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2025-03-08 22:49:56,895 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 22:49:56,895 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2025-03-08 22:49:56,895 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2025-03-08 22:49:56,895 INFO L87 Difference]: Start difference. First operand 245 states and 276 transitions. Second operand has 11 states, 11 states have (on average 4.636363636363637) internal successors, (51), 11 states have internal predecessors, (51), 2 states have call successors, (8), 2 states have call predecessors, (8), 4 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2025-03-08 22:49:57,197 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-08 22:49:57,197 INFO L93 Difference]: Finished difference Result 265 states and 298 transitions. [2025-03-08 22:49:57,197 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2025-03-08 22:49:57,198 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.636363636363637) internal successors, (51), 11 states have internal predecessors, (51), 2 states have call successors, (8), 2 states have call predecessors, (8), 4 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 71 [2025-03-08 22:49:57,198 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-08 22:49:57,199 INFO L225 Difference]: With dead ends: 265 [2025-03-08 22:49:57,199 INFO L226 Difference]: Without dead ends: 250 [2025-03-08 22:49:57,199 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 147 GetRequests, 131 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=99, Invalid=207, Unknown=0, NotChecked=0, Total=306 [2025-03-08 22:49:57,199 INFO L435 NwaCegarLoop]: 260 mSDtfsCounter, 17 mSDsluCounter, 956 mSDsCounter, 0 mSdLazyCounter, 158 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 1216 SdHoareTripleChecker+Invalid, 172 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 158 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2025-03-08 22:49:57,200 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [17 Valid, 1216 Invalid, 172 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 158 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2025-03-08 22:49:57,200 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 250 states. [2025-03-08 22:49:57,205 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 250 to 250. [2025-03-08 22:49:57,205 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 250 states, 146 states have (on average 1.7465753424657535) internal successors, (255), 233 states have internal predecessors, (255), 13 states have call successors, (13), 3 states have call predecessors, (13), 3 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2025-03-08 22:49:57,207 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 250 states to 250 states and 281 transitions. [2025-03-08 22:49:57,207 INFO L78 Accepts]: Start accepts. Automaton has 250 states and 281 transitions. Word has length 71 [2025-03-08 22:49:57,207 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-08 22:49:57,207 INFO L471 AbstractCegarLoop]: Abstraction has 250 states and 281 transitions. [2025-03-08 22:49:57,207 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 4.636363636363637) internal successors, (51), 11 states have internal predecessors, (51), 2 states have call successors, (8), 2 states have call predecessors, (8), 4 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2025-03-08 22:49:57,208 INFO L276 IsEmpty]: Start isEmpty. Operand 250 states and 281 transitions. [2025-03-08 22:49:57,209 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2025-03-08 22:49:57,209 INFO L210 NwaCegarLoop]: Found error trace [2025-03-08 22:49:57,209 INFO L218 NwaCegarLoop]: trace histogram [20, 6, 6, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-08 22:49:57,219 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2025-03-08 22:49:57,413 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 22:49:57,413 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting zalloc_or_dieErr0ASSERT_VIOLATIONMEMORY_DEREFERENCE === [l0_destroyErr0ASSERT_VIOLATIONMEMORY_FREE, l0_destroyErr1ASSERT_VIOLATIONMEMORY_FREE, l0_destroyErr2ASSERT_VIOLATIONMEMORY_FREE (and 86 more)] === [2025-03-08 22:49:57,413 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 22:49:57,413 INFO L85 PathProgramCache]: Analyzing trace with hash 995203616, now seen corresponding path program 2 times [2025-03-08 22:49:57,413 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 22:49:57,413 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [765422446] [2025-03-08 22:49:57,414 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-08 22:49:57,414 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 22:49:57,446 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 86 statements into 2 equivalence classes. [2025-03-08 22:49:57,584 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 86 of 86 statements. [2025-03-08 22:49:57,586 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-08 22:49:57,586 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unknown [2025-03-08 22:49:57,596 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1570680325] [2025-03-08 22:49:57,598 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-08 22:49:57,598 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 22:49:57,598 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-08 22:49:57,600 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-08 22:49:57,602 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2025-03-08 22:49:57,720 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 86 statements into 2 equivalence classes. [2025-03-08 22:49:57,950 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 86 of 86 statements. [2025-03-08 22:49:57,950 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-08 22:49:57,950 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 22:49:57,955 INFO L256 TraceCheckSpWp]: Trace formula consists of 800 conjuncts, 52 conjuncts are in the unsatisfiable core [2025-03-08 22:49:57,959 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-08 22:49:58,014 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2025-03-08 22:49:58,046 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2025-03-08 22:49:58,166 INFO L134 CoverageAnalysis]: Checked inductivity of 395 backedges. 115 proven. 158 refuted. 0 times theorem prover too weak. 122 trivial. 0 not checked. [2025-03-08 22:49:58,166 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-08 22:49:58,438 INFO L134 CoverageAnalysis]: Checked inductivity of 395 backedges. 143 proven. 10 refuted. 0 times theorem prover too weak. 242 trivial. 0 not checked. [2025-03-08 22:49:58,438 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 22:49:58,438 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [765422446] [2025-03-08 22:49:58,438 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2025-03-08 22:49:58,439 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1570680325] [2025-03-08 22:49:58,439 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1570680325] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-08 22:49:58,440 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2025-03-08 22:49:58,440 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 9] total 20 [2025-03-08 22:49:58,440 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1719982232] [2025-03-08 22:49:58,440 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2025-03-08 22:49:58,440 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2025-03-08 22:49:58,440 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 22:49:58,441 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2025-03-08 22:49:58,441 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=296, Unknown=0, NotChecked=0, Total=380 [2025-03-08 22:49:58,441 INFO L87 Difference]: Start difference. First operand 250 states and 281 transitions. Second operand has 20 states, 20 states have (on average 2.65) internal successors, (53), 20 states have internal predecessors, (53), 2 states have call successors, (6), 2 states have call predecessors, (6), 3 states have return successors, (6), 2 states have call predecessors, (6), 1 states have call successors, (6) [2025-03-08 22:49:58,986 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-08 22:49:58,987 INFO L93 Difference]: Finished difference Result 272 states and 307 transitions. [2025-03-08 22:49:58,987 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2025-03-08 22:49:58,987 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.65) internal successors, (53), 20 states have internal predecessors, (53), 2 states have call successors, (6), 2 states have call predecessors, (6), 3 states have return successors, (6), 2 states have call predecessors, (6), 1 states have call successors, (6) Word has length 86 [2025-03-08 22:49:58,987 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-08 22:49:58,988 INFO L225 Difference]: With dead ends: 272 [2025-03-08 22:49:58,988 INFO L226 Difference]: Without dead ends: 257 [2025-03-08 22:49:58,989 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 184 GetRequests, 152 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 174 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=270, Invalid=852, Unknown=0, NotChecked=0, Total=1122 [2025-03-08 22:49:58,989 INFO L435 NwaCegarLoop]: 260 mSDtfsCounter, 27 mSDsluCounter, 2999 mSDsCounter, 0 mSdLazyCounter, 368 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 3259 SdHoareTripleChecker+Invalid, 382 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 368 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2025-03-08 22:49:58,990 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [27 Valid, 3259 Invalid, 382 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 368 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2025-03-08 22:49:58,990 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 257 states. [2025-03-08 22:49:58,993 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 257 to 257. [2025-03-08 22:49:58,994 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 257 states, 153 states have (on average 1.7124183006535947) internal successors, (262), 240 states have internal predecessors, (262), 13 states have call successors, (13), 3 states have call predecessors, (13), 3 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2025-03-08 22:49:58,995 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 257 states to 257 states and 288 transitions. [2025-03-08 22:49:58,996 INFO L78 Accepts]: Start accepts. Automaton has 257 states and 288 transitions. Word has length 86 [2025-03-08 22:49:58,996 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-08 22:49:58,996 INFO L471 AbstractCegarLoop]: Abstraction has 257 states and 288 transitions. [2025-03-08 22:49:58,996 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.65) internal successors, (53), 20 states have internal predecessors, (53), 2 states have call successors, (6), 2 states have call predecessors, (6), 3 states have return successors, (6), 2 states have call predecessors, (6), 1 states have call successors, (6) [2025-03-08 22:49:58,996 INFO L276 IsEmpty]: Start isEmpty. Operand 257 states and 288 transitions. [2025-03-08 22:49:58,998 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2025-03-08 22:49:58,998 INFO L210 NwaCegarLoop]: Found error trace [2025-03-08 22:49:58,998 INFO L218 NwaCegarLoop]: trace histogram [40, 6, 6, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-08 22:49:59,009 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2025-03-08 22:49:59,198 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 22:49:59,199 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting zalloc_or_dieErr0ASSERT_VIOLATIONMEMORY_DEREFERENCE === [l0_destroyErr0ASSERT_VIOLATIONMEMORY_FREE, l0_destroyErr1ASSERT_VIOLATIONMEMORY_FREE, l0_destroyErr2ASSERT_VIOLATIONMEMORY_FREE (and 86 more)] === [2025-03-08 22:49:59,199 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 22:49:59,200 INFO L85 PathProgramCache]: Analyzing trace with hash -885081632, now seen corresponding path program 3 times [2025-03-08 22:49:59,200 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 22:49:59,200 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1468281958] [2025-03-08 22:49:59,200 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-03-08 22:49:59,200 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 22:49:59,236 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 106 statements into 18 equivalence classes. [2025-03-08 22:49:59,661 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 18 check-sat command(s) and asserted 106 of 106 statements. [2025-03-08 22:49:59,662 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 18 check-sat command(s) [2025-03-08 22:49:59,663 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unknown [2025-03-08 22:49:59,675 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2126153692] [2025-03-08 22:49:59,676 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-03-08 22:49:59,676 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 22:49:59,676 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-08 22:49:59,678 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-08 22:49:59,680 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2025-03-08 22:49:59,824 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 106 statements into 18 equivalence classes. [2025-03-08 22:49:59,838 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) and asserted 18 of 106 statements. [2025-03-08 22:49:59,838 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2025-03-08 22:49:59,838 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 22:49:59,840 INFO L256 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 24 conjuncts are in the unsatisfiable core [2025-03-08 22:49:59,842 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-08 22:49:59,854 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2025-03-08 22:49:59,868 INFO L134 CoverageAnalysis]: Checked inductivity of 1085 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 1070 trivial. 0 not checked. [2025-03-08 22:49:59,868 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2025-03-08 22:49:59,868 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 22:49:59,868 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1468281958] [2025-03-08 22:49:59,868 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2025-03-08 22:49:59,868 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2126153692] [2025-03-08 22:49:59,868 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2126153692] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-08 22:49:59,868 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-08 22:49:59,868 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2025-03-08 22:49:59,869 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [33106928] [2025-03-08 22:49:59,869 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-08 22:49:59,869 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2025-03-08 22:49:59,869 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 22:49:59,869 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2025-03-08 22:49:59,869 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2025-03-08 22:49:59,869 INFO L87 Difference]: Start difference. First operand 257 states and 288 transitions. Second operand has 4 states, 3 states have (on average 8.0) internal successors, (24), 3 states have internal predecessors, (24), 1 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) [2025-03-08 22:49:59,976 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-08 22:49:59,977 INFO L93 Difference]: Finished difference Result 256 states and 287 transitions. [2025-03-08 22:49:59,977 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2025-03-08 22:49:59,977 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 8.0) internal successors, (24), 3 states have internal predecessors, (24), 1 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) Word has length 106 [2025-03-08 22:49:59,977 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-08 22:49:59,978 INFO L225 Difference]: With dead ends: 256 [2025-03-08 22:49:59,978 INFO L226 Difference]: Without dead ends: 256 [2025-03-08 22:49:59,978 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 103 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2025-03-08 22:49:59,979 INFO L435 NwaCegarLoop]: 268 mSDtfsCounter, 11 mSDsluCounter, 449 mSDsCounter, 0 mSdLazyCounter, 91 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 717 SdHoareTripleChecker+Invalid, 91 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 91 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-03-08 22:49:59,979 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 717 Invalid, 91 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 91 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-03-08 22:49:59,979 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 256 states. [2025-03-08 22:49:59,985 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 256 to 256. [2025-03-08 22:49:59,985 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 256 states, 153 states have (on average 1.7058823529411764) internal successors, (261), 239 states have internal predecessors, (261), 13 states have call successors, (13), 3 states have call predecessors, (13), 3 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2025-03-08 22:49:59,987 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 256 states to 256 states and 287 transitions. [2025-03-08 22:49:59,988 INFO L78 Accepts]: Start accepts. Automaton has 256 states and 287 transitions. Word has length 106 [2025-03-08 22:49:59,989 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-08 22:49:59,989 INFO L471 AbstractCegarLoop]: Abstraction has 256 states and 287 transitions. [2025-03-08 22:49:59,989 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 8.0) internal successors, (24), 3 states have internal predecessors, (24), 1 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) [2025-03-08 22:49:59,990 INFO L276 IsEmpty]: Start isEmpty. Operand 256 states and 287 transitions. [2025-03-08 22:49:59,991 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2025-03-08 22:49:59,992 INFO L210 NwaCegarLoop]: Found error trace [2025-03-08 22:49:59,992 INFO L218 NwaCegarLoop]: trace histogram [45, 6, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-08 22:50:00,000 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2025-03-08 22:50:00,197 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 22:50:00,197 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr47REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [l0_destroyErr0ASSERT_VIOLATIONMEMORY_FREE, l0_destroyErr1ASSERT_VIOLATIONMEMORY_FREE, l0_destroyErr2ASSERT_VIOLATIONMEMORY_FREE (and 86 more)] === [2025-03-08 22:50:00,197 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 22:50:00,197 INFO L85 PathProgramCache]: Analyzing trace with hash 540889122, now seen corresponding path program 1 times [2025-03-08 22:50:00,197 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 22:50:00,197 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1020190193] [2025-03-08 22:50:00,198 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-08 22:50:00,198 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 22:50:00,232 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 118 statements into 1 equivalence classes. [2025-03-08 22:50:00,289 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 118 of 118 statements. [2025-03-08 22:50:00,289 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-08 22:50:00,289 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 22:50:01,238 INFO L134 CoverageAnalysis]: Checked inductivity of 1395 backedges. 601 proven. 61 refuted. 0 times theorem prover too weak. 733 trivial. 0 not checked. [2025-03-08 22:50:01,238 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 22:50:01,238 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1020190193] [2025-03-08 22:50:01,238 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1020190193] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-08 22:50:01,238 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [459874921] [2025-03-08 22:50:01,238 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-08 22:50:01,238 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 22:50:01,239 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-08 22:50:01,240 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-08 22:50:01,242 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2025-03-08 22:50:01,401 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 118 statements into 1 equivalence classes. [2025-03-08 22:50:01,521 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 118 of 118 statements. [2025-03-08 22:50:01,521 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-08 22:50:01,521 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 22:50:01,529 INFO L256 TraceCheckSpWp]: Trace formula consists of 1204 conjuncts, 22 conjuncts are in the unsatisfiable core [2025-03-08 22:50:01,531 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-08 22:50:01,591 WARN L873 $PredicateComparison]: unable to prove that (exists ((|zalloc_or_die_#Ultimate.C_memset_#ptr#1.base| Int)) (= (store |c_old(#valid)| |zalloc_or_die_#Ultimate.C_memset_#ptr#1.base| 1) |c_#valid|)) is different from true [2025-03-08 22:50:01,636 INFO L349 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2025-03-08 22:50:01,636 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 14 [2025-03-08 22:50:01,647 INFO L134 CoverageAnalysis]: Checked inductivity of 1395 backedges. 601 proven. 1 refuted. 0 times theorem prover too weak. 733 trivial. 60 not checked. [2025-03-08 22:50:01,647 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-08 22:50:01,839 INFO L349 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2025-03-08 22:50:01,840 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 11 [2025-03-08 22:50:01,860 INFO L134 CoverageAnalysis]: Checked inductivity of 1395 backedges. 601 proven. 61 refuted. 0 times theorem prover too weak. 733 trivial. 0 not checked. [2025-03-08 22:50:01,860 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [459874921] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-08 22:50:01,860 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-08 22:50:01,860 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11, 10] total 16 [2025-03-08 22:50:01,860 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [93089944] [2025-03-08 22:50:01,860 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-08 22:50:01,861 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2025-03-08 22:50:01,862 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 22:50:01,862 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2025-03-08 22:50:01,862 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=199, Unknown=1, NotChecked=28, Total=272 [2025-03-08 22:50:01,863 INFO L87 Difference]: Start difference. First operand 256 states and 287 transitions. Second operand has 17 states, 16 states have (on average 4.0) internal successors, (64), 15 states have internal predecessors, (64), 2 states have call successors, (7), 3 states have call predecessors, (7), 5 states have return successors, (8), 3 states have call predecessors, (8), 2 states have call successors, (8) [2025-03-08 22:50:02,486 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-08 22:50:02,486 INFO L93 Difference]: Finished difference Result 355 states and 407 transitions. [2025-03-08 22:50:02,486 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2025-03-08 22:50:02,486 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 16 states have (on average 4.0) internal successors, (64), 15 states have internal predecessors, (64), 2 states have call successors, (7), 3 states have call predecessors, (7), 5 states have return successors, (8), 3 states have call predecessors, (8), 2 states have call successors, (8) Word has length 118 [2025-03-08 22:50:02,487 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-08 22:50:02,490 INFO L225 Difference]: With dead ends: 355 [2025-03-08 22:50:02,490 INFO L226 Difference]: Without dead ends: 355 [2025-03-08 22:50:02,491 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 251 GetRequests, 227 SyntacticMatches, 5 SemanticMatches, 19 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=72, Invalid=311, Unknown=1, NotChecked=36, Total=420 [2025-03-08 22:50:02,491 INFO L435 NwaCegarLoop]: 214 mSDtfsCounter, 343 mSDsluCounter, 1667 mSDsCounter, 0 mSdLazyCounter, 1053 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 343 SdHoareTripleChecker+Valid, 1881 SdHoareTripleChecker+Invalid, 1467 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 1053 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 377 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2025-03-08 22:50:02,492 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [343 Valid, 1881 Invalid, 1467 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 1053 Invalid, 0 Unknown, 377 Unchecked, 0.5s Time] [2025-03-08 22:50:02,492 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 355 states. [2025-03-08 22:50:02,497 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 355 to 254. [2025-03-08 22:50:02,497 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 254 states, 153 states have (on average 1.6928104575163399) internal successors, (259), 237 states have internal predecessors, (259), 13 states have call successors, (13), 3 states have call predecessors, (13), 3 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2025-03-08 22:50:02,499 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 254 states to 254 states and 285 transitions. [2025-03-08 22:50:02,499 INFO L78 Accepts]: Start accepts. Automaton has 254 states and 285 transitions. Word has length 118 [2025-03-08 22:50:02,499 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-08 22:50:02,499 INFO L471 AbstractCegarLoop]: Abstraction has 254 states and 285 transitions. [2025-03-08 22:50:02,499 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 16 states have (on average 4.0) internal successors, (64), 15 states have internal predecessors, (64), 2 states have call successors, (7), 3 states have call predecessors, (7), 5 states have return successors, (8), 3 states have call predecessors, (8), 2 states have call successors, (8) [2025-03-08 22:50:02,499 INFO L276 IsEmpty]: Start isEmpty. Operand 254 states and 285 transitions. [2025-03-08 22:50:02,500 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2025-03-08 22:50:02,500 INFO L210 NwaCegarLoop]: Found error trace [2025-03-08 22:50:02,500 INFO L218 NwaCegarLoop]: trace histogram [45, 6, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-08 22:50:02,509 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2025-03-08 22:50:02,701 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 22:50:02,701 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr48REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [l0_destroyErr0ASSERT_VIOLATIONMEMORY_FREE, l0_destroyErr1ASSERT_VIOLATIONMEMORY_FREE, l0_destroyErr2ASSERT_VIOLATIONMEMORY_FREE (and 86 more)] === [2025-03-08 22:50:02,701 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 22:50:02,701 INFO L85 PathProgramCache]: Analyzing trace with hash 540889123, now seen corresponding path program 1 times [2025-03-08 22:50:02,701 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 22:50:02,701 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1303500458] [2025-03-08 22:50:02,701 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-08 22:50:02,702 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 22:50:02,737 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 118 statements into 1 equivalence classes. [2025-03-08 22:50:02,823 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 118 of 118 statements. [2025-03-08 22:50:02,823 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-08 22:50:02,823 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 22:50:04,615 INFO L134 CoverageAnalysis]: Checked inductivity of 1395 backedges. 601 proven. 97 refuted. 0 times theorem prover too weak. 697 trivial. 0 not checked. [2025-03-08 22:50:04,616 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 22:50:04,616 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1303500458] [2025-03-08 22:50:04,616 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1303500458] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-08 22:50:04,616 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [74600336] [2025-03-08 22:50:04,616 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-08 22:50:04,616 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 22:50:04,616 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-08 22:50:04,618 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-08 22:50:04,620 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2025-03-08 22:50:04,816 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 118 statements into 1 equivalence classes. [2025-03-08 22:50:06,235 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 118 of 118 statements. [2025-03-08 22:50:06,235 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-08 22:50:06,235 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 22:50:06,242 INFO L256 TraceCheckSpWp]: Trace formula consists of 1204 conjuncts, 119 conjuncts are in the unsatisfiable core [2025-03-08 22:50:06,246 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-08 22:50:06,438 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 9 [2025-03-08 22:50:15,938 WARN L873 $PredicateComparison]: unable to prove that (exists ((|zalloc_or_die_#Ultimate.C_memset_#ptr#1.base| Int)) (and (= (store |c_old(#length)| |zalloc_or_die_#Ultimate.C_memset_#ptr#1.base| (select |c_#length| |zalloc_or_die_#Ultimate.C_memset_#ptr#1.base|)) |c_#length|) (= (select |c_old(#valid)| |zalloc_or_die_#Ultimate.C_memset_#ptr#1.base|) 0))) is different from true [2025-03-08 22:50:15,980 INFO L190 IndexEqualityManager]: detected not equals via solver [2025-03-08 22:50:15,981 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 9 [2025-03-08 22:50:15,988 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2025-03-08 22:50:15,988 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2025-03-08 22:50:16,037 INFO L134 CoverageAnalysis]: Checked inductivity of 1395 backedges. 364 proven. 665 refuted. 0 times theorem prover too weak. 167 trivial. 199 not checked. [2025-03-08 22:50:16,037 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-08 22:50:16,209 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [74600336] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-08 22:50:16,209 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2025-03-08 22:50:16,209 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 29] total 47 [2025-03-08 22:50:16,209 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [532817742] [2025-03-08 22:50:16,209 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2025-03-08 22:50:16,210 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2025-03-08 22:50:16,210 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 22:50:16,210 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2025-03-08 22:50:16,211 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=139, Invalid=2214, Unknown=3, NotChecked=94, Total=2450 [2025-03-08 22:50:16,212 INFO L87 Difference]: Start difference. First operand 254 states and 285 transitions. Second operand has 48 states, 45 states have (on average 1.8666666666666667) internal successors, (84), 43 states have internal predecessors, (84), 3 states have call successors, (7), 2 states have call predecessors, (7), 5 states have return successors, (8), 5 states have call predecessors, (8), 3 states have call successors, (8) [2025-03-08 22:50:20,243 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2025-03-08 22:50:25,112 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-08 22:50:25,113 INFO L93 Difference]: Finished difference Result 385 states and 449 transitions. [2025-03-08 22:50:25,113 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2025-03-08 22:50:25,113 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 45 states have (on average 1.8666666666666667) internal successors, (84), 43 states have internal predecessors, (84), 3 states have call successors, (7), 2 states have call predecessors, (7), 5 states have return successors, (8), 5 states have call predecessors, (8), 3 states have call successors, (8) Word has length 118 [2025-03-08 22:50:25,113 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-08 22:50:25,114 INFO L225 Difference]: With dead ends: 385 [2025-03-08 22:50:25,115 INFO L226 Difference]: Without dead ends: 385 [2025-03-08 22:50:25,116 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 161 GetRequests, 92 SyntacticMatches, 1 SemanticMatches, 68 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 1080 ImplicationChecksByTransitivity, 11.2s TimeCoverageRelationStatistics Valid=323, Invalid=4370, Unknown=3, NotChecked=134, Total=4830 [2025-03-08 22:50:25,116 INFO L435 NwaCegarLoop]: 127 mSDtfsCounter, 283 mSDsluCounter, 2349 mSDsCounter, 0 mSdLazyCounter, 6867 mSolverCounterSat, 19 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 283 SdHoareTripleChecker+Valid, 2476 SdHoareTripleChecker+Invalid, 7283 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 6867 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 396 IncrementalHoareTripleChecker+Unchecked, 7.5s IncrementalHoareTripleChecker+Time [2025-03-08 22:50:25,116 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [283 Valid, 2476 Invalid, 7283 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 6867 Invalid, 1 Unknown, 396 Unchecked, 7.5s Time] [2025-03-08 22:50:25,117 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 385 states. [2025-03-08 22:50:25,123 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 385 to 252. [2025-03-08 22:50:25,124 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 252 states, 153 states have (on average 1.6797385620915033) internal successors, (257), 235 states have internal predecessors, (257), 13 states have call successors, (13), 3 states have call predecessors, (13), 3 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2025-03-08 22:50:25,125 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 252 states to 252 states and 283 transitions. [2025-03-08 22:50:25,126 INFO L78 Accepts]: Start accepts. Automaton has 252 states and 283 transitions. Word has length 118 [2025-03-08 22:50:25,126 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-08 22:50:25,126 INFO L471 AbstractCegarLoop]: Abstraction has 252 states and 283 transitions. [2025-03-08 22:50:25,126 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 45 states have (on average 1.8666666666666667) internal successors, (84), 43 states have internal predecessors, (84), 3 states have call successors, (7), 2 states have call predecessors, (7), 5 states have return successors, (8), 5 states have call predecessors, (8), 3 states have call successors, (8) [2025-03-08 22:50:25,126 INFO L276 IsEmpty]: Start isEmpty. Operand 252 states and 283 transitions. [2025-03-08 22:50:25,127 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2025-03-08 22:50:25,127 INFO L210 NwaCegarLoop]: Found error trace [2025-03-08 22:50:25,127 INFO L218 NwaCegarLoop]: trace histogram [45, 6, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-08 22:50:25,156 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2025-03-08 22:50:25,328 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 22:50:25,328 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr45REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [l0_destroyErr0ASSERT_VIOLATIONMEMORY_FREE, l0_destroyErr1ASSERT_VIOLATIONMEMORY_FREE, l0_destroyErr2ASSERT_VIOLATIONMEMORY_FREE (and 86 more)] === [2025-03-08 22:50:25,328 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 22:50:25,329 INFO L85 PathProgramCache]: Analyzing trace with hash 103410303, now seen corresponding path program 1 times [2025-03-08 22:50:25,329 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 22:50:25,329 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1238970295] [2025-03-08 22:50:25,329 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-08 22:50:25,329 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 22:50:25,363 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 120 statements into 1 equivalence classes. [2025-03-08 22:50:25,401 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 120 of 120 statements. [2025-03-08 22:50:25,402 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-08 22:50:25,402 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 22:50:26,295 INFO L134 CoverageAnalysis]: Checked inductivity of 1395 backedges. 833 proven. 96 refuted. 0 times theorem prover too weak. 466 trivial. 0 not checked. [2025-03-08 22:50:26,295 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 22:50:26,295 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1238970295] [2025-03-08 22:50:26,295 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1238970295] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-08 22:50:26,295 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [753624138] [2025-03-08 22:50:26,296 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-08 22:50:26,296 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 22:50:26,296 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-08 22:50:26,297 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-08 22:50:26,299 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2025-03-08 22:50:26,520 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 120 statements into 1 equivalence classes. [2025-03-08 22:50:26,635 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 120 of 120 statements. [2025-03-08 22:50:26,635 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-08 22:50:26,635 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 22:50:26,645 INFO L256 TraceCheckSpWp]: Trace formula consists of 1221 conjuncts, 33 conjuncts are in the unsatisfiable core [2025-03-08 22:50:26,649 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-08 22:50:26,704 WARN L873 $PredicateComparison]: unable to prove that (exists ((|zalloc_or_die_#Ultimate.C_memset_#ptr#1.base| Int)) (= (store |c_old(#valid)| |zalloc_or_die_#Ultimate.C_memset_#ptr#1.base| 1) |c_#valid|)) is different from true [2025-03-08 22:50:26,731 INFO L349 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2025-03-08 22:50:26,731 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 14 [2025-03-08 22:50:26,778 INFO L349 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2025-03-08 22:50:26,778 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 14 [2025-03-08 22:50:26,790 INFO L134 CoverageAnalysis]: Checked inductivity of 1395 backedges. 719 proven. 2 refuted. 0 times theorem prover too weak. 527 trivial. 147 not checked. [2025-03-08 22:50:26,790 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-08 22:50:27,065 INFO L349 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2025-03-08 22:50:27,065 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 11 [2025-03-08 22:50:27,079 INFO L134 CoverageAnalysis]: Checked inductivity of 1395 backedges. 719 proven. 149 refuted. 0 times theorem prover too weak. 527 trivial. 0 not checked. [2025-03-08 22:50:27,079 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [753624138] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-08 22:50:27,079 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-08 22:50:27,079 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 12, 11] total 22 [2025-03-08 22:50:27,079 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [855997487] [2025-03-08 22:50:27,079 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-08 22:50:27,079 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2025-03-08 22:50:27,079 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 22:50:27,080 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2025-03-08 22:50:27,080 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=403, Unknown=1, NotChecked=40, Total=506 [2025-03-08 22:50:27,080 INFO L87 Difference]: Start difference. First operand 252 states and 283 transitions. Second operand has 23 states, 22 states have (on average 3.3181818181818183) internal successors, (73), 20 states have internal predecessors, (73), 3 states have call successors, (9), 3 states have call predecessors, (9), 6 states have return successors, (10), 5 states have call predecessors, (10), 3 states have call successors, (10) [2025-03-08 22:50:27,879 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-08 22:50:27,879 INFO L93 Difference]: Finished difference Result 350 states and 402 transitions. [2025-03-08 22:50:27,879 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2025-03-08 22:50:27,879 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 22 states have (on average 3.3181818181818183) internal successors, (73), 20 states have internal predecessors, (73), 3 states have call successors, (9), 3 states have call predecessors, (9), 6 states have return successors, (10), 5 states have call predecessors, (10), 3 states have call successors, (10) Word has length 120 [2025-03-08 22:50:27,879 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-08 22:50:27,880 INFO L225 Difference]: With dead ends: 350 [2025-03-08 22:50:27,880 INFO L226 Difference]: Without dead ends: 350 [2025-03-08 22:50:27,881 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 264 GetRequests, 230 SyntacticMatches, 8 SemanticMatches, 26 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=99, Invalid=606, Unknown=1, NotChecked=50, Total=756 [2025-03-08 22:50:27,881 INFO L435 NwaCegarLoop]: 203 mSDtfsCounter, 141 mSDsluCounter, 2479 mSDsCounter, 0 mSdLazyCounter, 1664 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 141 SdHoareTripleChecker+Valid, 2682 SdHoareTripleChecker+Invalid, 2051 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 1664 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 372 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2025-03-08 22:50:27,881 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [141 Valid, 2682 Invalid, 2051 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 1664 Invalid, 0 Unknown, 372 Unchecked, 0.7s Time] [2025-03-08 22:50:27,882 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 350 states. [2025-03-08 22:50:27,885 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 350 to 249. [2025-03-08 22:50:27,885 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 249 states, 153 states have (on average 1.6601307189542485) internal successors, (254), 232 states have internal predecessors, (254), 13 states have call successors, (13), 3 states have call predecessors, (13), 3 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2025-03-08 22:50:27,886 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 249 states to 249 states and 280 transitions. [2025-03-08 22:50:27,886 INFO L78 Accepts]: Start accepts. Automaton has 249 states and 280 transitions. Word has length 120 [2025-03-08 22:50:27,887 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-08 22:50:27,887 INFO L471 AbstractCegarLoop]: Abstraction has 249 states and 280 transitions. [2025-03-08 22:50:27,887 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 22 states have (on average 3.3181818181818183) internal successors, (73), 20 states have internal predecessors, (73), 3 states have call successors, (9), 3 states have call predecessors, (9), 6 states have return successors, (10), 5 states have call predecessors, (10), 3 states have call successors, (10) [2025-03-08 22:50:27,887 INFO L276 IsEmpty]: Start isEmpty. Operand 249 states and 280 transitions. [2025-03-08 22:50:27,887 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2025-03-08 22:50:27,887 INFO L210 NwaCegarLoop]: Found error trace [2025-03-08 22:50:27,887 INFO L218 NwaCegarLoop]: trace histogram [45, 6, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-08 22:50:27,899 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2025-03-08 22:50:28,088 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2025-03-08 22:50:28,088 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr46REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [l0_destroyErr0ASSERT_VIOLATIONMEMORY_FREE, l0_destroyErr1ASSERT_VIOLATIONMEMORY_FREE, l0_destroyErr2ASSERT_VIOLATIONMEMORY_FREE (and 86 more)] === [2025-03-08 22:50:28,088 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 22:50:28,088 INFO L85 PathProgramCache]: Analyzing trace with hash 103410304, now seen corresponding path program 1 times [2025-03-08 22:50:28,089 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 22:50:28,089 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [619855900] [2025-03-08 22:50:28,089 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-08 22:50:28,089 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 22:50:28,125 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 120 statements into 1 equivalence classes. [2025-03-08 22:50:28,238 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 120 of 120 statements. [2025-03-08 22:50:28,238 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-08 22:50:28,238 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 22:50:29,736 INFO L134 CoverageAnalysis]: Checked inductivity of 1395 backedges. 719 proven. 246 refuted. 0 times theorem prover too weak. 430 trivial. 0 not checked. [2025-03-08 22:50:29,736 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 22:50:29,736 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [619855900] [2025-03-08 22:50:29,736 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [619855900] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-08 22:50:29,736 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2112408663] [2025-03-08 22:50:29,736 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-08 22:50:29,736 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 22:50:29,737 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-08 22:50:29,738 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-08 22:50:29,739 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2025-03-08 22:50:29,949 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 120 statements into 1 equivalence classes. [2025-03-08 22:50:31,111 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 120 of 120 statements. [2025-03-08 22:50:31,111 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-08 22:50:31,111 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 22:50:31,118 INFO L256 TraceCheckSpWp]: Trace formula consists of 1221 conjuncts, 106 conjuncts are in the unsatisfiable core [2025-03-08 22:50:31,122 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-08 22:50:31,269 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 9 [2025-03-08 22:50:32,948 WARN L873 $PredicateComparison]: unable to prove that (exists ((|zalloc_or_die_#Ultimate.C_memset_#ptr#1.base| Int)) (and (= (store |c_old(#length)| |zalloc_or_die_#Ultimate.C_memset_#ptr#1.base| (select |c_#length| |zalloc_or_die_#Ultimate.C_memset_#ptr#1.base|)) |c_#length|) (= |c_#valid| (store |c_old(#valid)| |zalloc_or_die_#Ultimate.C_memset_#ptr#1.base| (select |c_#valid| |zalloc_or_die_#Ultimate.C_memset_#ptr#1.base|))) (= (select |c_old(#valid)| |zalloc_or_die_#Ultimate.C_memset_#ptr#1.base|) 0))) is different from true [2025-03-08 22:50:33,371 INFO L190 IndexEqualityManager]: detected not equals via solver [2025-03-08 22:50:33,371 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 13 [2025-03-08 22:50:33,385 INFO L349 Elim1Store]: treesize reduction 20, result has 33.3 percent of original size [2025-03-08 22:50:33,386 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 19 treesize of output 16 [2025-03-08 22:50:33,405 WARN L873 $PredicateComparison]: unable to prove that (exists ((|zalloc_or_die_calloc_model_~ptr~0#1.base| Int)) (and (= (store |c_old(#length)| |zalloc_or_die_calloc_model_~ptr~0#1.base| (select |c_#length| |zalloc_or_die_calloc_model_~ptr~0#1.base|)) |c_#length|) (= (select |c_old(#valid)| |zalloc_or_die_calloc_model_~ptr~0#1.base|) 0))) is different from true [2025-03-08 22:50:33,445 INFO L190 IndexEqualityManager]: detected not equals via solver [2025-03-08 22:50:33,445 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 13 [2025-03-08 22:50:33,454 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2025-03-08 22:50:33,454 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2025-03-08 22:50:33,538 INFO L134 CoverageAnalysis]: Checked inductivity of 1395 backedges. 565 proven. 379 refuted. 0 times theorem prover too weak. 234 trivial. 217 not checked. [2025-03-08 22:50:33,538 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-08 22:50:33,669 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2112408663] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-08 22:50:33,669 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2025-03-08 22:50:33,669 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 36] total 57 [2025-03-08 22:50:33,669 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [814217479] [2025-03-08 22:50:33,669 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2025-03-08 22:50:33,669 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 58 states [2025-03-08 22:50:33,669 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 22:50:33,670 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2025-03-08 22:50:33,670 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=184, Invalid=3128, Unknown=2, NotChecked=226, Total=3540 [2025-03-08 22:50:33,670 INFO L87 Difference]: Start difference. First operand 249 states and 280 transitions. Second operand has 58 states, 57 states have (on average 1.9824561403508771) internal successors, (113), 55 states have internal predecessors, (113), 3 states have call successors, (8), 2 states have call predecessors, (8), 7 states have return successors, (9), 7 states have call predecessors, (9), 3 states have call successors, (9) [2025-03-08 22:50:37,839 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2025-03-08 22:50:42,943 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2025-03-08 22:50:47,143 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2025-03-08 22:50:51,330 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2025-03-08 22:50:55,459 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2025-03-08 22:50:59,679 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2025-03-08 22:51:03,821 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2025-03-08 22:51:11,941 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-08 22:51:11,941 INFO L93 Difference]: Finished difference Result 355 states and 410 transitions. [2025-03-08 22:51:11,942 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2025-03-08 22:51:11,942 INFO L78 Accepts]: Start accepts. Automaton has has 58 states, 57 states have (on average 1.9824561403508771) internal successors, (113), 55 states have internal predecessors, (113), 3 states have call successors, (8), 2 states have call predecessors, (8), 7 states have return successors, (9), 7 states have call predecessors, (9), 3 states have call successors, (9) Word has length 120 [2025-03-08 22:51:11,942 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-08 22:51:11,943 INFO L225 Difference]: With dead ends: 355 [2025-03-08 22:51:11,943 INFO L226 Difference]: Without dead ends: 355 [2025-03-08 22:51:11,944 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 167 GetRequests, 91 SyntacticMatches, 2 SemanticMatches, 74 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 1370 ImplicationChecksByTransitivity, 4.7s TimeCoverageRelationStatistics Valid=379, Invalid=5029, Unknown=2, NotChecked=290, Total=5700 [2025-03-08 22:51:11,944 INFO L435 NwaCegarLoop]: 116 mSDtfsCounter, 289 mSDsluCounter, 2108 mSDsCounter, 0 mSdLazyCounter, 7804 mSolverCounterSat, 21 mSolverCounterUnsat, 7 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 35.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 289 SdHoareTripleChecker+Valid, 2224 SdHoareTripleChecker+Invalid, 8583 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 7804 IncrementalHoareTripleChecker+Invalid, 7 IncrementalHoareTripleChecker+Unknown, 751 IncrementalHoareTripleChecker+Unchecked, 35.9s IncrementalHoareTripleChecker+Time [2025-03-08 22:51:11,944 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [289 Valid, 2224 Invalid, 8583 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 7804 Invalid, 7 Unknown, 751 Unchecked, 35.9s Time] [2025-03-08 22:51:11,945 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 355 states. [2025-03-08 22:51:11,949 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 355 to 246. [2025-03-08 22:51:11,949 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 246 states, 153 states have (on average 1.6405228758169934) internal successors, (251), 229 states have internal predecessors, (251), 13 states have call successors, (13), 3 states have call predecessors, (13), 3 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2025-03-08 22:51:11,950 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 246 states to 246 states and 277 transitions. [2025-03-08 22:51:11,950 INFO L78 Accepts]: Start accepts. Automaton has 246 states and 277 transitions. Word has length 120 [2025-03-08 22:51:11,950 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-08 22:51:11,950 INFO L471 AbstractCegarLoop]: Abstraction has 246 states and 277 transitions. [2025-03-08 22:51:11,950 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 58 states, 57 states have (on average 1.9824561403508771) internal successors, (113), 55 states have internal predecessors, (113), 3 states have call successors, (8), 2 states have call predecessors, (8), 7 states have return successors, (9), 7 states have call predecessors, (9), 3 states have call successors, (9) [2025-03-08 22:51:11,951 INFO L276 IsEmpty]: Start isEmpty. Operand 246 states and 277 transitions. [2025-03-08 22:51:11,951 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2025-03-08 22:51:11,951 INFO L210 NwaCegarLoop]: Found error trace [2025-03-08 22:51:11,951 INFO L218 NwaCegarLoop]: trace histogram [45, 6, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-08 22:51:11,973 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2025-03-08 22:51:12,155 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 22:51:12,156 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr39REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [l0_destroyErr0ASSERT_VIOLATIONMEMORY_FREE, l0_destroyErr1ASSERT_VIOLATIONMEMORY_FREE, l0_destroyErr2ASSERT_VIOLATIONMEMORY_FREE (and 86 more)] === [2025-03-08 22:51:12,156 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 22:51:12,156 INFO L85 PathProgramCache]: Analyzing trace with hash 608307481, now seen corresponding path program 1 times [2025-03-08 22:51:12,156 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 22:51:12,156 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [802374229] [2025-03-08 22:51:12,156 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-08 22:51:12,156 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 22:51:12,186 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 126 statements into 1 equivalence classes. [2025-03-08 22:51:12,218 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 126 of 126 statements. [2025-03-08 22:51:12,218 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-08 22:51:12,218 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 22:51:13,342 INFO L134 CoverageAnalysis]: Checked inductivity of 1395 backedges. 830 proven. 188 refuted. 0 times theorem prover too weak. 377 trivial. 0 not checked. [2025-03-08 22:51:13,343 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 22:51:13,343 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [802374229] [2025-03-08 22:51:13,343 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [802374229] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-08 22:51:13,343 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1985301926] [2025-03-08 22:51:13,343 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-08 22:51:13,343 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 22:51:13,343 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-08 22:51:13,346 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-08 22:51:13,352 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2025-03-08 22:51:13,626 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 126 statements into 1 equivalence classes. [2025-03-08 22:51:13,734 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 126 of 126 statements. [2025-03-08 22:51:13,734 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-08 22:51:13,735 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 22:51:13,740 INFO L256 TraceCheckSpWp]: Trace formula consists of 1266 conjuncts, 42 conjuncts are in the unsatisfiable core [2025-03-08 22:51:13,743 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-08 22:51:13,826 WARN L873 $PredicateComparison]: unable to prove that (exists ((|zalloc_or_die_#Ultimate.C_memset_#ptr#1.base| Int)) (and (= (store |c_old(#valid)| |zalloc_or_die_#Ultimate.C_memset_#ptr#1.base| 1) |c_#valid|) (= (select |c_old(#valid)| |zalloc_or_die_#Ultimate.C_memset_#ptr#1.base|) 0))) is different from true [2025-03-08 22:51:13,893 INFO L349 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2025-03-08 22:51:13,893 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 21 [2025-03-08 22:51:13,938 WARN L873 $PredicateComparison]: unable to prove that (exists ((|zalloc_or_die_#Ultimate.C_memset_#ptr#1.base| Int)) (and (= |c_#valid| (store |c_old(#valid)| |zalloc_or_die_#Ultimate.C_memset_#ptr#1.base| (select |c_#valid| |zalloc_or_die_#Ultimate.C_memset_#ptr#1.base|))) (= (select |c_old(#valid)| |zalloc_or_die_#Ultimate.C_memset_#ptr#1.base|) 0))) is different from true [2025-03-08 22:51:14,013 INFO L349 Elim1Store]: treesize reduction 40, result has 32.2 percent of original size [2025-03-08 22:51:14,013 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 24 treesize of output 28 [2025-03-08 22:51:14,067 WARN L873 $PredicateComparison]: unable to prove that (exists ((|zalloc_or_die_#Ultimate.C_memset_#ptr#1.base| Int)) (= (store |c_old(#valid)| |zalloc_or_die_#Ultimate.C_memset_#ptr#1.base| 1) |c_#valid|)) is different from true [2025-03-08 22:51:14,103 INFO L349 Elim1Store]: treesize reduction 28, result has 28.2 percent of original size [2025-03-08 22:51:14,103 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 22 [2025-03-08 22:51:14,167 INFO L134 CoverageAnalysis]: Checked inductivity of 1395 backedges. 659 proven. 3 refuted. 0 times theorem prover too weak. 289 trivial. 444 not checked. [2025-03-08 22:51:14,167 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-08 22:51:14,404 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1985301926] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-08 22:51:14,404 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2025-03-08 22:51:14,404 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 16] total 27 [2025-03-08 22:51:14,404 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [931995363] [2025-03-08 22:51:14,404 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2025-03-08 22:51:14,404 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2025-03-08 22:51:14,404 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 22:51:14,405 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2025-03-08 22:51:14,405 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=671, Unknown=3, NotChecked=162, Total=930 [2025-03-08 22:51:14,405 INFO L87 Difference]: Start difference. First operand 246 states and 277 transitions. Second operand has 28 states, 27 states have (on average 3.6296296296296298) internal successors, (98), 24 states have internal predecessors, (98), 5 states have call successors, (8), 2 states have call predecessors, (8), 7 states have return successors, (9), 6 states have call predecessors, (9), 5 states have call successors, (9) [2025-03-08 22:51:15,708 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-08 22:51:15,708 INFO L93 Difference]: Finished difference Result 344 states and 396 transitions. [2025-03-08 22:51:15,709 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2025-03-08 22:51:15,709 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 27 states have (on average 3.6296296296296298) internal successors, (98), 24 states have internal predecessors, (98), 5 states have call successors, (8), 2 states have call predecessors, (8), 7 states have return successors, (9), 6 states have call predecessors, (9), 5 states have call successors, (9) Word has length 126 [2025-03-08 22:51:15,709 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-08 22:51:15,710 INFO L225 Difference]: With dead ends: 344 [2025-03-08 22:51:15,710 INFO L226 Difference]: Without dead ends: 344 [2025-03-08 22:51:15,710 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 188 GetRequests, 149 SyntacticMatches, 4 SemanticMatches, 35 ConstructedPredicates, 3 IntricatePredicates, 0 DeprecatedPredicates, 165 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=148, Invalid=983, Unknown=3, NotChecked=198, Total=1332 [2025-03-08 22:51:15,711 INFO L435 NwaCegarLoop]: 193 mSDtfsCounter, 159 mSDsluCounter, 2859 mSDsCounter, 0 mSdLazyCounter, 1972 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 159 SdHoareTripleChecker+Valid, 3052 SdHoareTripleChecker+Invalid, 3093 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 1972 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1097 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2025-03-08 22:51:15,711 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [159 Valid, 3052 Invalid, 3093 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 1972 Invalid, 0 Unknown, 1097 Unchecked, 1.1s Time] [2025-03-08 22:51:15,711 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 344 states. [2025-03-08 22:51:15,715 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 344 to 243. [2025-03-08 22:51:15,716 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 243 states, 153 states have (on average 1.6209150326797386) internal successors, (248), 226 states have internal predecessors, (248), 13 states have call successors, (13), 3 states have call predecessors, (13), 3 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2025-03-08 22:51:15,718 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 243 states to 243 states and 274 transitions. [2025-03-08 22:51:15,718 INFO L78 Accepts]: Start accepts. Automaton has 243 states and 274 transitions. Word has length 126 [2025-03-08 22:51:15,719 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-08 22:51:15,719 INFO L471 AbstractCegarLoop]: Abstraction has 243 states and 274 transitions. [2025-03-08 22:51:15,719 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 27 states have (on average 3.6296296296296298) internal successors, (98), 24 states have internal predecessors, (98), 5 states have call successors, (8), 2 states have call predecessors, (8), 7 states have return successors, (9), 6 states have call predecessors, (9), 5 states have call successors, (9) [2025-03-08 22:51:15,719 INFO L276 IsEmpty]: Start isEmpty. Operand 243 states and 274 transitions. [2025-03-08 22:51:15,720 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2025-03-08 22:51:15,720 INFO L210 NwaCegarLoop]: Found error trace [2025-03-08 22:51:15,720 INFO L218 NwaCegarLoop]: trace histogram [45, 6, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-08 22:51:15,730 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2025-03-08 22:51:15,925 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2025-03-08 22:51:15,925 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr40REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [l0_destroyErr0ASSERT_VIOLATIONMEMORY_FREE, l0_destroyErr1ASSERT_VIOLATIONMEMORY_FREE, l0_destroyErr2ASSERT_VIOLATIONMEMORY_FREE (and 86 more)] === [2025-03-08 22:51:15,925 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 22:51:15,926 INFO L85 PathProgramCache]: Analyzing trace with hash 608307482, now seen corresponding path program 1 times [2025-03-08 22:51:15,926 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 22:51:15,926 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2128073904] [2025-03-08 22:51:15,926 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-08 22:51:15,926 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 22:51:15,960 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 126 statements into 1 equivalence classes. [2025-03-08 22:51:16,033 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 126 of 126 statements. [2025-03-08 22:51:16,033 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-08 22:51:16,033 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 22:51:18,123 INFO L134 CoverageAnalysis]: Checked inductivity of 1395 backedges. 659 proven. 395 refuted. 0 times theorem prover too weak. 341 trivial. 0 not checked. [2025-03-08 22:51:18,123 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 22:51:18,123 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2128073904] [2025-03-08 22:51:18,124 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2128073904] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-08 22:51:18,124 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1738280578] [2025-03-08 22:51:18,124 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-08 22:51:18,124 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 22:51:18,124 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-08 22:51:18,125 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-08 22:51:18,126 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2025-03-08 22:51:18,403 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 126 statements into 1 equivalence classes. [2025-03-08 22:51:19,579 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 126 of 126 statements. [2025-03-08 22:51:19,579 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-08 22:51:19,579 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 22:51:19,586 INFO L256 TraceCheckSpWp]: Trace formula consists of 1266 conjuncts, 120 conjuncts are in the unsatisfiable core [2025-03-08 22:51:19,590 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-08 22:51:19,797 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 9